My Buckmark eats all different kinds of .22 ammo and is VERY accurate. I prefer to shoot the Federal 550 packs when I can find them. I just got an 8 box order in from Cabelas for the Remington 525 packs and am going to see how they fare.
However, my grandfather who was a .22 cal competition shooter also advised me that std velocity rounds were more accurate. If I start to compete then I will worry more about "ragged hole groups" until then...let the rounds fly and the paper die!